Grinding-machine.



No. 849,391. PATENTED APR. 9, 1907 H. L. HENRY & W. ALTHOPF.

GRINDING MACHINE.

APPLICATION FILED FEB. 23,1906.

in vcmors UNITED STATE-S PATENT OFFICE.

HORACE LYNFORD HENRY AND WALTER ALTI-IOFF, OF GENEVA,

NEW YORK.

GRINDING-MACHINE.

Specification of Letters Patent.

Patented April 9, 190?.

To all whom it may concern:

Be it known that we, HORACE LYNFORD HENRY and WALTER ALTI-IOFF, citizens of the United States, and residents of and whose post-ollice addresses are Geneva, in the county of Ontario and State of New York, have invented certain new and useful Improvements in Grinding-ltl achines, of which the following is a specification.

Our invention relates to improvements in grinding-machines, and especially to grinding-machines in which the work is intended to be held between two wheels each grinding opposite faces.

The objects of our invention are to provide a simple, durable, inexpensive, effective machine easily operated and capable of nice adjustment, both manual and automatic. We attain these objects by the devices described and illustrated in the accompanying specification and drawings.

Figure 1 is a plan view of the principal elements of our machine. Fig. 2 is a side elevation ofthe same. Fig. 3 is a front end eleva tion omitting the driving-pulleys and belt. Fig. 4 is a rear end elevation showing only the driving-pulleys, belt, and bearings. Fig. 5 is a detail view of the pivoted bearings carrying the grinding-wheel arbors, partly in section, on the line a I), Fig. 1, and showing the pressure-springs. Fig. 6 is a perspective view of the grinding-wheels with a razorblade between the same.

Referring to the figures, 1 1 are the drivin pulleys; 2, the belt passing around both pu leys, thus driving them in the same direc tion; 3 3, sleeves forming a part of the driving-shafts; 4 4, springs to maintain longitudinal pressure on the balls and sockets of the connecting-rods; 5 5, slots containing pins secured in the sleeves 3, by which arrangcment longitudinal motion is permitted without interfering with the rotation of the parts.

6 6 and S 8 are ball-and-sockct join permitting angular relation botween the various parts of the driving mechanism.

7 7 are connecting-rods to transmit motion between the pullcyshafts and grinder-arbors.

9 9 are sliding carriages carrying the bearings and grinder-shafts and sliding upon the beveled table 13.

toward or away from each other at the will i of the operator.

14 14, &c., are springs bearing against the pivoted bearing-blocks 18 18.

15 15 are adjustingscrews for regulating the tension of the springs.

16 16 are the grinding-Wheels; 17 17, the bases or lugs'supporting the bearing-blocks 18; 19 19, pivot-screws on which the tongues 20 20 oscillate and by which they are secured in the bases 17.

21 21 are cone-bearings for the grinding shafts.

Heretofore in grinding-machines the grind ing-wheels have maintained amore or less rigid relation to each other, generally only capable of manual and definite adjustment, and in the case of grinding razors making it impossible to satisfactorily grind an oval bevel, which is necessary in a full concave razor. This has been done in the past by hand. It is important that there should be an opportunity for automatic adjustment as well, so that inequalities of speed, shape of wheels, or in the material operated upon may be provided for by means not dependent upon aiixed relation of the grinding-surfaces or mere manual skill. h'loreover, it is often desirable that diil'eront-sized wheels may be used on the same machine. At the same time the drive should be direct and positive and capable of high speed.

we prefer to drive our wheels in the same direction and use a single belt passing about both driving-pulleys, which are of course mounted in lixcd bearings. This insures equal speed in the two driving-pulleys. It is evident that it wheels are used of such size that the shafts, c mnccting-rods, and arbors are all in line then when smaller wheels are used and thc carriages 9 9 are screwed ncarcr each other thcsc connecting-rods will lie at an angle to each other, (the arbors and pulley-shafts necessarily always remaining parallel.) To permit this change in relation, moans must be employed to transu t, the motion of the pulleys to the grindcfis irrespective of the dill'crence in angular direction and the ensuing difference of distance lKEtWCORl the source and point of zij)j l!('-alt-l()il ol the power in the organized machine. \Ve prei er to employ the well-l nown bull-and-sbuliet joints and rigid c:animating-rod having found that the ordinary unive joints or ilexible shafting are iinpraet :able at high speeds such as are necessary to attain ou" ends. We sometimes employ a speed as i gh as six thousand revolutions per minute. 'lhe springs i insure suflicient pressure in the balland-socket joints, and the cones 21 accommodate any thrust.

Thelugs or bases 17 are secured to or may be integral with the carriages .l t), and to these ugs the bearing-blocks is are movably secured as follows: The ton ue 20, which referably an integral part of the bearingblock 18, is mounted on the'piv ot It) held in the lug 17 in such a way that the bearingblock 18 i ree to rdck thereon The construction i uch, however that the motion of the arbor-bearings toward each other is limited to the contact of the edges I, d, Fig. 5; and these bearings are normally held in that position by the resilience ol'the springs 14,

but are capable considerable m'o tion away from each other against the resistance ol the springs.

The operation of the device is: By means of the Wheel 12 and screw 11 11 we adjust the wheels 16 16 against a razor or other blade to be ground. The belt 2 turns the pulleys 1 at the same speed and in the same direction. The motion is transmitted at an angle through the balla:nd-socl et joints 6 S and connectingrods '7 to the arbors running in the bearings 18, the springs 4 preserving the thrust on the driving elements. The springs 14, pressing against the bearings 18, tend to keep the wheels It; normally at the point determined by the atljusting-screws 15; but they yield sullicienttv to allow the bear ings 18 to oscillate away l'roin each other as may be necessary during the o 'n'ration ol' grinding, thus securing an even grind, which is especially important in grinding certain l'orms ol beveled razors and which has been heretoloro dillicult or impossible to accomplish except. by hand. lt will also be seen that it is impossible l'or the hearings to be moved or jarred nearer together than the distance set by the right and lel't screw ll ll", as the rocking motion is awa 'l'rom the blade. 'lhis obviates any chanrc ol' cutting the blades thin in spots.

Ne do not lilnit ourselves lo the exact form, dinu-nsions or arrangement ol' lhe elements ol' devices here shown. as they are only our prel'eremzes.

Where we have used 1 he word llexible we mean by that t include such connections as permit, the arbors lo be moved to or l'rom each other out of the line ol' the drivingshafts while yet transmitting the niolion ol' the latter, and thus may include different forms of joint, or other connections capable ol' being bent; but

What we do claim and desire to secure by Letters Patent, is

i. The combination of a plurality of drivingpulleys actuated by a single belt passing about both in the same direction; pulleyshal'ts having a sleeve, and internal springs; driving-arbors lnovably secured to said sleeves and abutting against said springs; grinding-arbors running in cone-bearings; connecting rods provided with ball and socket joints connecting the driving-arbors and grinding-arbors; movable carriages car;- ry ing bearing-lugs; bearing-blocks pivotaily secured tothe lugs so as to admit of a rocking motionaway from the opposite ones; springs adjustably bearin against said bearing- ,bloeks; and a rig itand-left-handed screw controlling the carriages and adapted to regulate their relation.

, 2. The combination of a plurality of driving pulleys and shafts equally driven and revolving in the $511116 direction; grindingarbors; and ball-and-socket connections joiningthe driving-shafts and grinding-whore; bearings holding the grinding-arbors, pivotally mounted upon oppositely-adjustabis carriages; adjustable springs bearing against said bearings, and a screw adapted to adjust the position of the carriages.

3. The combination of driving-pulleys and shafts; grinding-arbors; flexible connections between the shafts and arbors; movable bearings holding the arbors, mountedupon oppositely-movable carriages, and adjustable means mounted on said carriages fol automatically resisting the separation of the bearings; and means for adjusting the carriages.

4. The combination of a-rbors; oppositelymovable carriages carrying oppositely-movable. bearings holding the arbors; resilient means mounted on said carriages for automatically resisting the separation of the bearings: means l'or communicating motion lo the arbors, and means for adjusting the carriages.

5. ln an abradingsmachine, oppositely-- movable bearings holding arbors mounted on oppositely-movable carriages; resilient means interposed between the carriage and the bearing adapted to resist the separation ol the bearings, and meansfor adjusting the relative position 'ol' the carriages.

ll. ln an abrading-niacl-iine, bearings carrygi'lIrillllg-urbors pivotally mounted upon caniages; resilient means mounted on said rarriages adaptedto automatically resist the separation ol' the bearings, and means for adjust ing the relation of the carriages.

7. 'llie combination ol' t)pposititty-movable carriages; bearings pivotally mounted thereon carrying arbors and springs interposed between the bearings and the carriages adapted to normally and automatically resist the separation of the bearings.

8. The combination of transversely-movable carriages; bearings carrying grindingarbors pivoted thereon; means for adjusting the carriages, and adjustable resilient means interposed between the bearings and the carriages adapted to automatically resist the separation of the bearings.

9. In a grinding-machine, transverselymovable spring-regulated pivoted bearings carrying grinding-arbors mounted on transversely-movable carriages, and means for adjusting the same.

10. In a grinding-maulline, the c0mbination of fixed driving-shafts, transverselymovable oppositely-disposed and springadjusted grinding-arbors, and flexible connections between the shafts and arbors.

11. The combination of a plurality of shafts equally driven and revolving in the Signed at New York, in the county of New 30 York and State of New York, this 19th day of February, 1906.

HORACE LYNFORD HENRY. WVitnesses:

HENRY S. REYNOLDS, A. M. SEIDLER.

Signed at Geneva,'in the county of Ontario and State of New York, this 20th day of February, 1906.

WALTER ALTHOFF. l/Vitnesses E. J. CORK, F. D. WHITWELL. 

